chore(deps): update dependency vue-property-decorator to v9

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
vue-property-decorator	devDependencies	major	8.4.2 -> 9.0.0

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Release Notes

kaorun343/vue-property-decorator

### [`v9.0.0`](https://togithub.com/kaorun343/vue-property-decorator/blob/master/CHANGELOG.md#v900) [Compare Source](https://togithub.com/kaorun343/vue-property-decorator/compare/v8.5.1...v9.0.0) - Move `vue-class-component` to `peerDependencies` ### [`v8.5.1`](https://togithub.com/kaorun343/vue-property-decorator/blob/master/CHANGELOG.md#v851) [Compare Source](https://togithub.com/kaorun343/vue-property-decorator/compare/3730103cd024d0f2560b01ee23b5c3aba8fac394...v8.5.1) - Move `vue-class-component` to `dependencies` ### [`v8.5.0`](https://togithub.com/kaorun343/vue-property-decorator/blob/master/CHANGELOG.md#v850) [Compare Source](https://togithub.com/kaorun343/vue-property-decorator/compare/v8.4.2...3730103cd024d0f2560b01ee23b5c3aba8fac394) - Revert [#​299](https://togithub.com/kaorun343/vue-property-decorator/issues/299) - Add CHANGELOG.md - Fix README.md ([#​319](https://togithub.com/kaorun343/vue-property-decorator/issues/319)) - Move `vue-class-component` to `peerDependencies`

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